Many around here like the 3-2-1 method for cooking ribs...
Stolen from another thread
The 3-2-1 smoked rib recipe is a good way to smoke ribs and tends to turn out perfect ribs every time whether you are using the meatier spares or the baby backs. The ribs are smoked at 225 - 250 degrees for best results.
The 3 stands for the 3 hours that you initially smoke the ribs with nothing but your favorite rub on them and your favorite hardwood such as hickory, mesquite, apple, pecan, etc. After the 3 hours you remove the ribs and quickly double wrap them in heavy duty foil.. just before you seal them off splash on some apple juice for good measure and close the foil leaving some room around the ribs for the steam to be able to flow around the meat and do it's magic.
The ribs cook in the smoker wrapped for 2 hours undisturbed. After 2 hours remove the ribs from the smoker, unwrap and place back into the smoker for the final 1 hour. You can add a glaze or sauce at this point if you wish. The meat will literally fall off the bone and be extremely juicy, tender and flavorful.